// 使用原生的 fetch API
function parseJSON(response) {
    return response.json();
}

function checkStatus(response) {
    if (response.status >= 200 && response.status < 300) {
        return response;
    }

    const error = new Error(response.statusText);
    error.response = response;
    throw error;
}

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [options] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */
export default async function request(url, options = {}) {
    try {
        const response = await fetch(url, options);
        checkStatus(response);
        const data = await parseJSON(response);
        return { data };
    } catch (err) {
        return { err };
    }
}
